Now for something lighter: did you know common office sticky tape emits x-rays?

From Wired:

Gallery: Take an X-Ray With Your Office Sticky Tape

It has been known for a long time that sticky tape emits visible light when peeled in a dark room (try it!). But researchers at UCLA have also discovered that peeling sticky tape in a vacuum sends out pulses of X-rays along with visible light, though the actual mechanism that causes the X-rays to form is not yet understood.